Jonathan and Firefox have yet to explain how embedded modules like Disqus, Stripe, or similar are meant to go about their business and without resorting to the

Jonathan and Firefox have yet to explain how embedded modules like Disqus, Stripe, or similar are meant to go about their business and without resorting to the EverCookie-like tactics? Facebook or similar apps requiring stateful sessions? I guess we'll all just setup 2nd party sub-domains for advertisers, or serve our ads off a Google domain (or <insert entrenched advertiser>).